"Passengers" avoids the "I'm not lady"/"I'm no gentleman" (so the statement or order doesn't apply to me) problem, as well as the few and far between passengers who take offense at the terms. But normally one would simply omit the vocative introduction, not replace it with a "neutral" one.

Transit workers recently received a bulletin that requires them to use gender-neutral terms such as “passengers,” “riders” or “everyone.”

...conductors will override prerecorded greetings that use “ladies and gentlemen” until the replacements are made.

Managers and supervisors have been told to “monitor for everyone’s compliance" with the new rules.

Ed: From the Newsweek story "“They are trying to be politically correct,” Anthony Staley, a station worker and Transport Workers Union member, told the Post. “They are acknowledging that they have some transgender riders. They don’t want to offend anyone.”

Transit workers recently received a bulletin that requires them to use gender-neutral terms such as “passengers,” “riders” or “everyone.”

...conductors will override prerecorded greetings that use “ladies and gentlemen” until the replacements are made.

Managers and supervisors have been told to “monitor for everyone’s compliance" with the new rules.

Ed: From the Newsweek story "“They are trying to be politically correct,” Anthony Staley, a station worker and Transport Workers Union member, told the Post. “They are acknowledging that they have some transgender riders. They don’t want to offend anyone.”

They offend me by trying to be politically correct!!!!!!!!!!!!!!!

My my 15 exclamation points.

Informed by Data.Driven by the SPIRIT and JESUS’s Example.Promoting the Kingdom of GOD on Earth.